st.select_slider

Display a slider widget to select items from a list.

This also allows you to render a range slider by passing a two-element tuple or list as the value.

The difference between st.select_slider and st.slider is that select_slider accepts any datatype and takes an iterable set of options, while st.slider only accepts numerical or date/time data and takes a range as input.

Function signature[source]
st.select_slider(label, options=(), value=None, format_func=special_internal_function, key=None, help=None, on_change=None, args=None, kwargs=None, *, disabled=False, label_visibility="visible", width="stretch", bind=None)
Parameters
label (str)	A short label explaining to the user what this slider is for. The label can optionally contain GitHub-flavored Markdown of the following types: Bold, Italics, Strikethroughs, Inline Code, Links, and Images. Images display like icons, with a max height equal to the font height. Unsupported Markdown elements are unwrapped so only their children (text contents) render. Common block-level Markdown (headings, lists, blockquotes) is automatically escaped and displays as literal text in labels. See the `body` parameter of `st.markdown` for additional, supported Markdown directives. For accessibility reasons, you should never set an empty label, but you can hide it with `label_visibility` if needed. In the future, we may disallow empty labels by raising an exception.
options (Iterable)	Labels for the select options in an `Iterable`. This can be a `list`, `set`, or anything supported by `st.dataframe`. If `options` is dataframe-like, the first column will be used. Each label will be cast to `str` internally by default. Each item in the iterable can optionally contain GitHub-flavored Markdown, subject to the same limitations described in the `label` parameter.
value (a supported type or a tuple/list of supported types or None)	The value of the slider when it first renders. If a tuple/list of two values is passed here, then a range slider with those lower and upper bounds is rendered. For example, if set to (1, 10) the slider will have a selectable range between 1 and 10. Defaults to first option.
format_func (function)	Function to modify the display of the labels from the options. argument. It receives the option as an argument and its output will be cast to str.
key (str, int, or None)	An optional string or integer to use as the unique key for the widget. If this is `None` (default), a key will be generated for the widget based on the values of the other parameters. No two widgets may have the same key. Assigning a key stabilizes the widget's identity and preserves its state across reruns even when other parameters change. A key lets you read or update the widget's value via `st.session_state[key]`. For more details, see Widget behavior. Additionally, if `key` is provided, it will be used as a CSS class name prefixed with `st-key-`.
help (str or None)	A tooltip that gets displayed next to the widget label. Streamlit only displays the tooltip when `label_visibility="visible"`. If this is `None` (default), no tooltip is displayed. The tooltip can optionally contain GitHub-flavored Markdown, including the Markdown directives described in the `body` parameter of `st.markdown`.
on_change (callable)	An optional callback invoked when this select_slider's value changes.
args (list or tuple)	An optional list or tuple of args to pass to the callback.
kwargs (dict)	An optional dict of kwargs to pass to the callback.
disabled (bool)	An optional boolean that disables the select slider if set to `True`. The default is `False`.
label_visibility ("visible", "hidden", or "collapsed")	The visibility of the label. The default is `"visible"`. If this is `"hidden"`, Streamlit displays an empty spacer instead of the label, which can help keep the widget aligned with other widgets. If this is `"collapsed"`, Streamlit displays no label or spacer.
width ("stretch" or int)	The width of the slider widget. This can be one of the following: `"stretch"` (default): The width of the widget matches the width of the parent container. An integer specifying the width in pixels: The widget has a fixed width. If the specified width is greater than the width of the parent container, the width of the widget matches the width of the parent container.
bind ("query-params" or None)	Binding mode for syncing the widget's value with a URL query parameter. If this is `None` (default), the widget's value is not synced to the URL. When this is set to `"query-params"`, changes to the widget update the URL, and the widget can be initialized or updated through a query parameter in the URL. This requires `key` to be set. The key is used as the query parameter name. When the widget's value equals its default, the query parameter is removed from the URL to keep it clean. A bound query parameter can't be set or deleted through `st.query_params`; it can only be programmatically changed through `st.session_state`. Invalid query parameter values are ignored and removed from the URL. Range select sliders use repeated parameters (e.g., `?color=red&color=blue`).
Returns
(any value or tuple of any value)	The current value of the slider widget. The return type will match the data type of the value parameter. This contains copies of the selected options, not the originals.

Examples

Python

import streamlit as st

color = st.select_slider(
    "Select a color of the rainbow",
    options=[
        "red",
        "orange",
        "yellow",
        "green",
        "blue",
        "indigo",
        "violet",
    ],
)
st.write("My favorite color is", color)

And here's an example of a range select slider:

Python

import streamlit as st

start_color, end_color = st.select_slider(
    "Select a range of color wavelength",
    options=[
        "red",
        "orange",
        "yellow",
        "green",
        "blue",
        "indigo",
        "violet",
    ],
    value=("red", "blue"),
)
st.write("You selected wavelengths between", start_color, "and", end_color)